Reinstatement and Rediagnosis of Catapaguroides setosus and Description of a Second Hawaiian Species of the Genus (Decapoda: Anomura: Paguridea: Paguridae)l

A species of the hermit crab genus Catapaguroides recently discovered in a sand-dwelling Halimeda community on the island of Maui, Hawaiian Islands, prompted a reexamination of the holotype of Catapaguroides setosus (Edmondson, 1951), described from off the south coast of O'ahu. The latter species, currently considered a junior subjective synonym of Catapaguroides fragilis (Melin), is herein adjudged neither synonymous with C. fragilis nor conspecific with the second Hawaiian species. Catapaguroides setosus is reinstated with full specific rank, rediagnosed, and illustrated. The second species, Catapaguroides hooveri McLaughlin & Pittman, n. sp., is described and illustrated. As PART OF THE bycatch of a 1998-1999 survey of Hawaiian opisthobranch mollusks at a site 1.6 km north of Keka'a Point, on the island of Maui, Hawaiian Islands, the attention of one of the authors (GP.) was drawn to a colorful, fast-moving, tiny hermit crab. Several very small hermit crab species are known from the shallow waters of the Hawaiian Islands (e.g., Edmondson 1951, McLaughlin and Haig 1984, McLaughlin 1986); however, this is the first species recognized exclusively from the sand-dwelling Halimeda community. This hermit crab has been found to represent an undescribed species of the genus Catapaguroides A. MilneEdwards & Bouvier, 1892. In her revision of the genera Catapaguroides and Cestopagurus, de Saint Laurent (1968) transferred the Hawaiian Cestopagurus setosus Edmondson, 1951, to the genus Catapaguroides, and placed it in synonymy with Catapaguroides fragilis (Melin, 1939). De Saint 1 This is a scientific contribution from the Shannon Point Marine Center, Western Washington University. Manuscript accepted 20 March 2001. 2 Shannon Point Marine Center, Western Washington University, 1900 Shannon Point Road, Anacortes, Washington 98221-9081B (E-mail: patsy®sos.net). 3 P.O. Box 23, Fairfield, Washington 99012. Pacific Science (2002), vol. 56, no. 1:41-48 © 2002 by University of Hawai'i Press.